'use strict'
const path = require('path')
const defaultSettings = require('./src/settings.js')

function resolve(dir) {
  return path.join(__dirname, dir)
}

const name = defaultSettings.title || 'vue Admin Template' // page title

// If your port is set to 80,
// use administrator privileges to execute the command line.
// For example, Mac: sudo npm run
// You can change the port by the following methods:
// port = 9528 npm run dev OR npm run dev --port = 9528
console.log('环境变量设置:', process.env)
const port = process.env.port || process.env.npm_config_port || 9528 // dev port

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
  /**
   * You will need to set publicPath if you plan to deploy your site under a sub path,
   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
   * then publicPath should be set to "/bar/".
   * In most cases please use '/' !!!
   * Detail: https://cli.vuejs.org/config/#publicpath
   */
  publicPath: '/',
  outputDir: 'dist',
  assetsDir: 'static',
  lintOnSave: process.env.NODE_ENV === 'development',
  productionSourceMap: false,
  devServer: {
    port: port,
    open: true,
    overlay: {
      warnings: false,
      errors: true
    },
    // 代理跨域的配置
    proxy: {
      '/api': {
        // 当我们的本地的请求 有/api的时候，就会代理我们的请求地址向另外一个服务器发出请求
        target: 'http://8.142.65.7:8600', // 跨域请求的地址
        // changeOrigin: true, // 只有这个值为true的情况下 才表示开启跨域(默认true)
        }
      }
    },
    configureWebpack: {
      // provide the app's title in webpack's name field, so that
      // it can be accessed in index.html to inject the correct title.
      name: name,
      resolve: {
        alias: {
          '@': resolve('src')
        }
      }
    },
    chainWebpack(config) {
      // it can improve the speed of the first screen, it is recommended to turn on preload
      config.plugin('preload').tap(() => [
        {
          rel: 'preload',
          // to ignore runtime.js
          // https://github.com/vuejs/vue-cli/blob/dev/packages/@vue/cli-service/lib/config/app.js#L171
          fileBlacklist: [/\.map$/, /hot-update\.js$/, /runtime\..*\.js$/],
          include: 'initial'
        }
      ])

      // when there are many pages, it will cause too many meaningless requests
      config.plugins.delete('prefetch')

      // set svg-sprite-loader
      config.module
        .rule('svg')
        .exclude.add(resolve('src/icons'))
        .end()
      config.module
        .rule('icons')
        .test(/\.svg$/)
        .include.add(resolve('src/icons'))
        .end()
        .use('svg-sprite-loader')
        .loader('svg-sprite-loader')
        .options({
          symbolId: 'icon-[name]'
        })
        .end()

      config
        .when(process.env.NODE_ENV !== 'development',
          config => {
            config
              .plugin('ScriptExtHtmlWebpackPlugin')
              .after('html')
              .use('script-ext-html-webpack-plugin', [{
                // `runtime` must same as runtimeChunk name. default is `runtime`
                inline: /runtime\..*\.js$/
              }])
              .end()
            config
              .optimization.splitChunks({
                chunks: 'all',
                cacheGroups: {
                  libs: {
                    name: 'chunk-libs',
                    test: /[\\/]node_modules[\\/]/,
                    priority: 10,
                    chunks: 'initial' // only package third parties that are initially dependent
                  },
                  elementUI: {
                    name: 'chunk-elementUI', // split elementUI into a single package
                    priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                    test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
                  },
                  commons: {
                    name: 'chunk-commons',
                    test: resolve('src/components'), // can customize your rules
                    minChunks: 3, //  minimum common number
                    priority: 5,
                    reuseExistingChunk: true
                  }
                }
              })
            // https:// webpack.js.org/configuration/optimization/#optimizationruntimechunk
            config.optimization.runtimeChunk('single')
          }
        )
    }
  }

